Nvidia security updates

"New"??  drivers popup at nvidia site:  309.08 + 341.44 + 345.20  date 24/2/2015

309.08 notebook http://www.nvidia.com/download/driverResults.aspx/82760/en-us

341.44 http://www.nvidia.com/download/driverResults.aspx/82467/en-us
345.20 http://www.nvidia.com/download/driverResults.aspx/82578/en-us


"This driver adds security updates for the driver components nvlddmkm.sys and nv4_mini.sys."

What's going on here?

Does Nvidia refreshing all the drivers with security updates ?

Regards,